Enter American odds like -200, -110, or +150 to convert the moneyline into implied probability, decimal odds, fractional odds, profit, and total payout.
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Convert the line once, then move into fair-price, Kelly sizing, Expected Value Calculator, or hedge math without re-entering the core numbers.
Manual inputs only. No automated odds lookup or automatic bet placement was used.
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The stake field turns this converter into a moneyline payout calculator: profit is stake times net odds, while total payout includes your original stake.
Implied Probability Calculator
Convert American, decimal, or fractional odds into implied probability, then check the same line against profit and payout from your stake.
Decimal Odds to Implied Probability Calculator
Enter decimal odds like 1.50, 1.91, or 2.50 to convert the price into implied probability, American odds, fractional odds, profit, and total payout.
Expected Value Calculator
Enter sportsbook odds, your estimated win probability, and stake to model EV dollars, ROI, edge, fair odds, payout, and Kelly sizing.
No-Vig Calculator
Remove the vig to see true fair odds and probabilities.
For informational and educational purposes only. Not financial or gambling advice. All calculations assume odds remain constant and bets execute as entered. Actual results may vary. Gambling involves risk of loss.
An American odds to implied probability calculator converts a moneyline price into the break-even win rate represented by that price. It is built for US sportsbook odds, favorites, underdogs, and quick market checks before EV or no-vig work.
Positive: Probability = 100 / (American + 100); Negative: Probability = |American| / (|American| + 100)For positive American odds, divide 100 by the odds plus 100. For negative American odds, divide the absolute odds by the absolute odds plus 100. American -200 becomes 200 ÷ 300 = 66.67%.
Use 200 divided by 200 plus 100. The result is 66.67% implied probability.
Use 100 divided by 150 plus 100. The result is 40.00% implied probability.
Yes, posted odds usually include sportsbook hold. Implied probability is the break-even rate from the price, not necessarily the fair true probability.
Implied Probability
The probability of an outcome as implied by the betting odds, including the bookmaker's margin.
Moneyline
A bet on which team or player will win a game outright, with no point spread.
Vig (Vigorish)
The commission a sportsbook charges on a bet, built into the odds.
True Odds
The actual mathematical probability of an outcome, without any bookmaker margin.
Expected Value (EV)
The average amount you can expect to win or lose per bet over time.
No-Vig Odds
The true fair odds after removing the sportsbook's built-in margin.
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